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SMV-48-500 Datasheet(PDF) 9 Page - Astrodyne Corporation |
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SMV-48-500 Datasheet(HTML) 9 Page - Astrodyne Corporation |
9 / 13 page 500 Watt, High Efficiency, AC/DC Power Modules SMV-500 WWW.ASTRODYNETDI.COM ASTRODYNE USA: 1-800-823-8082 ASTRODYNE PACIFIC: 886-2-26983458 Rev.3.6 2014/02/26 Web Site: http://www.acbel.com 10 Fig. 4 Bulk cap ripple current requirement vs. Output load R2 R2 R2 R2: Inrush current limit. Resistance can be calculated by formula below. Suggest to choose resistance >10ohm. . Vinrms: Input voltage Ir,pk : Inrush current peak value. Sufficient inrush energy withstand capacity is required. Required energy capacity can be calculated below and suggest having some design margin. Cbulk : Bulk capacitance (C10&C11) Vinrms: Input voltage. The selected inrush resistor R2 have to meet the formula below, if the resistor value over the limitation may cause the brick damage. Cbulk : Bulk capacitance (C10&C11) C12 C12 C12 C12: Part of EMI filter. Choose safety approved Y-cap. C13 C14 C13 C14 C13 C14 C13 C14: E-cap to reduce output ripple and ensure stability. Choose low ESR part and check the ripple current rating higher than application. Suggest at least 470uF*2 if Tb>-20℃ and 470uF*4 if -40℃<Tb<-20℃. C15 C15 C15 C15: Connect ceramic capacitor near output terminal to reduce output noise. C16 C17 C16 C17 C16 C17 C16 C17: Ceramic or film capacitor for EMI filtering. High voltage rating is required for isolation requirement. pk Ir Vin R rms , 2 * = 2 ) 2 (* 2 1 rms bulk Vin C bulk C mS R * 20 300 < |
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